Did anyone test these claims? Google has incredible resources from Street View and every Android device giving them data (opt-out which nobody knows exists). How can this company which I never heard of do better?

I haven't been able to find anything that talks to their API without me having to find a way to collect the WiFi and 2g/3g signal strengths and type it over in their website API demo.

Just using a single GSM tower it works as well as you might expect (big radius around the tower's location), but of course WiFi is where it gets interesting.